Getting ready for our annual RV trip. Heading to Myrtle Beach as long as Maria doesn't wreck in the next few days. On the way back heading into the Blue Ridge Mountains. I somehow managed to make us stop (hee,hee) at Natural Tunnel State Park for a night or two. What NS line runs through there and what is the frequency of movements there. It looks like southbound trains are better for pics. What else rail related is nearby? Aren't the two trestles over Copper Creek?? nearby? Any advice would be greatly appreciated. Thanks!